[cairo] [Bug 90166] Add a way to specify units (in SVG output)

[Adrian Johnson]

On 16/10/17 07:42, Petr Kobalíček wrote:
> 'MM/CM' vs 'INCHES' and all others seems inconsistent to me.

What do you suggest?

> 
> On Thu, Oct 12, 2017 at 9:38 PM, Adrian Johnson <ajohnson at redneon.com
> <mailto:ajohnson at redneon.com>> wrote:
> 
>     On 12/10/17 21:59, Adrian Johnson wrote:
>     > On 12/10/17 20:55, Antonio Ospite wrote:
>     >> The API addition I originally proposed[1,2] looks like this:
>     >>
>     >> void cairo_svg_surface_set_document_unit (cairo_surface_t*, cairo_svg_unit_t)
>     >>
>     >> Where cairo_svg_unit_t is an enum type representing all the possible
>     >> units.
>     >
>     > The enum in the patch is:
>     >
>     > typedef enum _cairo_svg_unit {
>     >     CAIRO_SVG_UNIT_EM,
>     >     CAIRO_SVG_UNIT_EX,
>     >     CAIRO_SVG_UNIT_PX,
>     >     CAIRO_SVG_UNIT_IN,
>     >     CAIRO_SVG_UNIT_CM,
>     >     CAIRO_SVG_UNIT_MM,
>     >     CAIRO_SVG_UNIT_PT,
>     >     CAIRO_SVG_UNIT_PC,
>     >     CAIRO_SVG_UNIT_PERCENT,
>     >     CAIRO_SVG_UNIT_USER
>     > } cairo_svg_unit_t;
> 
>     We don't have to use the SVG abbreviations in the enum. The non standard
>     abbreviations can be expanded to make it clearer. I've reordered it
>     slightly to put the default first followed by the more common units.
> 
>     typedef enum _cairo_svg_unit {
>         CAIRO_SVG_UNIT_POINTS,
>         CAIRO_SVG_UNIT_PIXELS,
>         CAIRO_SVG_UNIT_MM,
>         CAIRO_SVG_UNIT_CM,
>         CAIRO_SVG_UNIT_INCHES,
>         CAIRO_SVG_UNIT_PICAS,
>         CAIRO_SVG_UNIT_FONT_EM,
>         CAIRO_SVG_UNIT_FONT_X,
>         CAIRO_SVG_UNIT_PERCENT,
>         CAIRO_SVG_UNIT_USER
>     } cairo_svg_unit_t;
> 
> 
>     >
>     > This looks good to me. It just needs a getter. Are all the units
>     in SVG
>     > 1.1? If not the minimum version will need to be documented. The
>     default
>     > unit will also need to be documented.
>     >
> 
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> 
> 
> 
>